diff --git a/llvm/Makefile.config.in b/llvm/Makefile.config.in
index 9b2deac12613..92b4e3ff7e08 100644
--- a/llvm/Makefile.config.in
+++ b/llvm/Makefile.config.in
@@ -33,19 +33,20 @@ LLVM_CONFIGTIME   := @LLVM_CONFIGTIME@
 #
 ###########################################################################
 
+PWD := @BINPWD@
 # Set the project name to LLVM if its not defined
 ifndef PROJECT_NAME
 PROJECT_NAME := LLVM
 endif
 
-PROJ_OBJ_DIR  := $(shell pwd)
-PROJ_OBJ_ROOT := $(subst //,/,$(shell cd $(PROJ_OBJ_DIR)/$(LEVEL); pwd))
+PROJ_OBJ_DIR  := $(shell $(PWD))
+PROJ_OBJ_ROOT := $(shell cd $(PROJ_OBJ_DIR)/$(LEVEL); $(PWD))
 
 ifeq ($(PROJECT_NAME),LLVM)
-LLVM_SRC_ROOT   := @abs_top_srcdir@
-LLVM_OBJ_ROOT   := @abs_top_builddir@
-PROJ_SRC_ROOT   := $(LLVM_SRC_ROOT)
-PROJ_SRC_DIR    := $(subst //,/,$(LLVM_SRC_ROOT)/$(patsubst $(PROJ_OBJ_ROOT)%,%,$(PROJ_OBJ_DIR)))
+LLVM_SRC_ROOT   := $(shell cd @abs_top_srcdir@; $(PWD))
+LLVM_OBJ_ROOT   := $(shell cd @abs_top_builddir@; $(PWD))
+PROJ_SRC_ROOT   := $(shell cd $(LLVM_SRC_ROOT); $(PWD))
+PROJ_SRC_DIR    := $(shell cd $(LLVM_SRC_ROOT)/$(patsubst $(PROJ_OBJ_ROOT)%,%,$(PROJ_OBJ_DIR)); $(PWD))
 PROJ_prefix     := @prefix@
 PROJ_bindir     := @prefix@/bin
 PROJ_libdir     := @prefix@/lib
@@ -72,7 +73,7 @@ endif
 ifndef LLVM_OBJ_ROOT
 $(error Projects must define LLVM_OBJ_ROOT)
 endif
-PROJ_SRC_DIR := $(subst //,/,$(PROJ_SRC_ROOT)/$(patsubst $(PROJ_OBJ_ROOT)%,%,$(PROJ_OBJ_DIR)))
+PROJ_SRC_DIR := $(shell cd $(PROJ_SRC_ROOT)/$(patsubst $(PROJ_OBJ_ROOT)%,%,$(PROJ_OBJ_DIR)); $(PWD))
 PROJ_prefix     := $(PROJ_INSTALL_ROOT)
 PROJ_bindir     := $(PROJ_INSTALL_ROOT)/bin
 PROJ_libdir     := $(PROJ_INSTALL_ROOT)/lib
diff --git a/llvm/autoconf/configure.ac b/llvm/autoconf/configure.ac
index 3a40d9b1346f..6d1624491d0e 100644
--- a/llvm/autoconf/configure.ac
+++ b/llvm/autoconf/configure.ac
@@ -374,6 +374,7 @@ AC_PROG_RANLIB
 AC_PATH_PROG(RM,   [rm],   [rm])
 AC_PATH_PROG(SED,  [sed],  [sed])
 AC_PATH_PROG(TAR,  [tar],  [gtar])
+AC_PATH_PROG(BINPWD,[pwd],  [pwd])
 
 dnl Looking for misc. graph plotting software
 AC_PATH_PROG(GRAPHVIZ, [Graphviz], [echo Graphviz])
diff --git a/llvm/configure b/llvm/configure
index e57466b8c7ad..c9685252cd33 100755
--- a/llvm/configure
+++ b/llvm/configure
@@ -477,7 +477,7 @@ ac_includes_default="\
 # include <unistd.h>
 #endif"
 
-ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS LLVM_COPYRIGHT subdirs build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os OS LLVM_ON_UNIX LLVM_ON_WIN32 ARCH ENDIAN CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT LLVM_CROSS_COMPILING BUILD_CC BUILD_EXEEXT CVSBUILD ENABLE_OPTIMIZED DISABLE_ASSERTIONS DEBUG_RUNTIME JIT TARGET_HAS_JIT ENABLE_DOXYGEN ENABLE_THREADS TARGETS_TO_BUILD EXTRA_OPTIONS CPP CXX CXXFLAGS ac_ct_CXX LEX LEXLIB LEX_OUTPUT_ROOT FLEX YACC BISON NM ifGNUmake LN_S CMP CP DATE FIND GREP MKDIR MV RANLIB ac_ct_RANLIB RM SED TAR GRAPHVIZ DOT GV DOTTY PERL HAVE_PERL INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA BZIP2 DOXYGEN ETAGS GROFF GZIP POD2HTML POD2MAN RUNTEST TCLSH ZIP EGREP INSTALL_LTDL_TRUE INSTALL_LTDL_FALSE CONVENIENCE_LTDL_TRUE CONVENIENCE_LTDL_FALSE LIBADD_DL ECHO AR ac_ct_AR STRIP ac_ct_STRIP CXXCPP F77 FFLAGS ac_ct_F77 LIBTOOL ETAGSFLAGS LLVMGCC LLVMGXX ALLOCA MMAP_FILE LLVMCC1 LLVMCC1PLUS LLVMGCCDIR LLVMGCC_VERSION LLVMGCC_MAJVERS SHLIBEXT LLVM_PREFIX LLVM_BINDIR LLVM_LIBDIR LLVM_DATADIR LLVM_DOCSDIR LLVM_ETCDIR LLVM_INCLUDEDIR LLVM_INFODIR LLVM_MANDIR LLVM_CONFIGTIME LIBOBJS LTLIBOBJS'
+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS LLVM_COPYRIGHT subdirs build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os OS LLVM_ON_UNIX LLVM_ON_WIN32 ARCH ENDIAN CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT LLVM_CROSS_COMPILING BUILD_CC BUILD_EXEEXT CVSBUILD ENABLE_OPTIMIZED DISABLE_ASSERTIONS DEBUG_RUNTIME JIT TARGET_HAS_JIT ENABLE_DOXYGEN ENABLE_THREADS TARGETS_TO_BUILD EXTRA_OPTIONS CPP CXX CXXFLAGS ac_ct_CXX LEX LEXLIB LEX_OUTPUT_ROOT FLEX YACC BISON NM ifGNUmake LN_S CMP CP DATE FIND GREP MKDIR MV RANLIB ac_ct_RANLIB RM SED TAR BINPWD GRAPHVIZ DOT GV DOTTY PERL HAVE_PERL INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA BZIP2 DOXYGEN ETAGS GROFF GZIP POD2HTML POD2MAN RUNTEST TCLSH ZIP EGREP INSTALL_LTDL_TRUE INSTALL_LTDL_FALSE CONVENIENCE_LTDL_TRUE CONVENIENCE_LTDL_FALSE LIBADD_DL ECHO AR ac_ct_AR STRIP ac_ct_STRIP CXXCPP F77 FFLAGS ac_ct_F77 LIBTOOL ETAGSFLAGS LLVMGCC LLVMGXX ALLOCA MMAP_FILE LLVMCC1 LLVMCC1PLUS LLVMGCCDIR LLVMGCC_VERSION LLVMGCC_MAJVERS SHLIBEXT LLVM_PREFIX LLVM_BINDIR LLVM_LIBDIR LLVM_DATADIR LLVM_DOCSDIR LLVM_ETCDIR LLVM_INCLUDEDIR LLVM_INFODIR LLVM_MANDIR LLVM_CONFIGTIME LIBOBJS LTLIBOBJS'
 ac_subst_files=''
 
 # Initialize some variables set by options.
@@ -5373,6 +5373,46 @@ else
 echo "${ECHO_T}no" >&6
 fi
 
+# Extract the first word of "pwd", so it can be a program name with args.
+set dummy pwd; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_path_BINPWD+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  case $BINPWD in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BINPWD="$BINPWD" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_BINPWD="$as_dir/$ac_word$ac_exec_ext"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+  test -z "$ac_cv_path_BINPWD" && ac_cv_path_BINPWD="pwd"
+  ;;
+esac
+fi
+BINPWD=$ac_cv_path_BINPWD
+
+if test -n "$BINPWD"; then
+  echo "$as_me:$LINENO: result: $BINPWD" >&5
+echo "${ECHO_T}$BINPWD" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
 
 # Extract the first word of "Graphviz", so it can be a program name with args.
 set dummy Graphviz; ac_word=$2
@@ -8751,7 +8791,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 8754 "configure"
+#line 8794 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10742,7 +10782,7 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 10745 "configure"' > conftest.$ac_ext
+  echo '#line 10785 "configure"' > conftest.$ac_ext
   if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -11227,7 +11267,7 @@ fi
 
 
 # Provide some information about the compiler.
-echo "$as_me:11230:" \
+echo "$as_me:11270:" \
      "checking for Fortran 77 compiler version" >&5
 ac_compiler=`set X $ac_compile; echo $2`
 { (eval echo "$as_me:$LINENO: \"$ac_compiler --version </dev/null >&5\"") >&5
@@ -12284,11 +12324,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:12287: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:12327: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:12291: \$? = $ac_status" >&5
+   echo "$as_me:12331: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -12527,11 +12567,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:12530: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:12570: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:12534: \$? = $ac_status" >&5
+   echo "$as_me:12574: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -12587,11 +12627,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:12590: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:12630: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:12594: \$? = $ac_status" >&5
+   echo "$as_me:12634: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -14772,7 +14812,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 14775 "configure"
+#line 14815 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -14870,7 +14910,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 14873 "configure"
+#line 14913 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -17063,11 +17103,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:17066: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:17106: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:17070: \$? = $ac_status" >&5
+   echo "$as_me:17110: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -17123,11 +17163,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:17126: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:17166: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:17130: \$? = $ac_status" >&5
+   echo "$as_me:17170: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -18484,7 +18524,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 18487 "configure"
+#line 18527 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -18582,7 +18622,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 18585 "configure"
+#line 18625 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -19419,11 +19459,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:19422: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:19462: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:19426: \$? = $ac_status" >&5
+   echo "$as_me:19466: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -19479,11 +19519,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:19482: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:19522: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:19486: \$? = $ac_status" >&5
+   echo "$as_me:19526: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -21518,11 +21558,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:21521: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:21561: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:21525: \$? = $ac_status" >&5
+   echo "$as_me:21565: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -21761,11 +21801,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:21764: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:21804: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:21768: \$? = $ac_status" >&5
+   echo "$as_me:21808: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings
@@ -21821,11 +21861,11 @@ else
    -e 's:.*FLAGS}? :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:21824: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:21864: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:21828: \$? = $ac_status" >&5
+   echo "$as_me:21868: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -24006,7 +24046,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 24009 "configure"
+#line 24049 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -24104,7 +24144,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 24107 "configure"
+#line 24147 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -32116,6 +32156,7 @@ s,@ac_ct_RANLIB@,$ac_ct_RANLIB,;t t
 s,@RM@,$RM,;t t
 s,@SED@,$SED,;t t
 s,@TAR@,$TAR,;t t
+s,@BINPWD@,$BINPWD,;t t
 s,@GRAPHVIZ@,$GRAPHVIZ,;t t
 s,@DOT@,$DOT,;t t
 s,@GV@,$GV,;t t